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How can you calculate the distance between 2 points in a grid if they're not on the same horizontal or vertical line?

Recall Pythagoras' theorem. a^2 + b^2 = c^2. Think about this as a triangle, with a and b being the lengths of the 2 perpendicular sides, and c being the length of the hypotenuse. [Drawing on a whiteboard wo...
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Answered by Tom C. • Maths tutor
4822 Views

When integrating, why do we add a constant to the resulting equation?

The +c is to represent the loss in information after differentiation. Remember, integration is just the reverse of differentiation. Say we had this function: f(x) = 2x^2 + 1 And we differentiate: f'(x) = 4x ...
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Answered by Tom C. • Maths tutor
4551 Views

My teacher has marked 'no creo que es asi' as wrong. Why?

When expressing a negated opinion, you need to use the subjunctive. So it should be 'no creo que sea asi'. This applies to many other opinion verbs, like pensar. Remember: Pienso/creo que... use the indicati...
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Answered by Amelia B. • Spanish tutor
4141 Views

What is 0.032 multiplied by 1000

When we have numbers that are smaller than 1 we use the coma to help us multiplie by 1000. As there are 3 zeros in 1000, we will move the coma on 0.032 3 times to the right to make it bigger. So once would b...
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Answered by Bryony S. • Maths tutor
7128 Views

When do you use the article with possessive adjectives? And when do you omit?

The general rule of thumb with Italian is that possessive adjectives use a definite article alongside them (e.g. il mio libro, la sua macchina). The only exception to this rule is with family members, where ...
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Answered by Freddie K. • Italian tutor
4505 Views